Improvement in rotary steam-engines



A. VIVARTTAS..

ROTARY STEAM-ENGINE.

`Paten ted July 17, 1877.

Invehor UNITED STATES T OFFICE.

ALOHA VIVARTTAS, OF NEW YORK, N. Y., ASSIGNOR TO THE CENTRAL PROPELLINGCOMPANY, OF SAME PLACE.

IMPROVEMENT IN ROTARY STEAM-ENGINES.

Specification forming part of Letters Patent N o.

l93,l33, dated July 17, 1877; application filed November 15, 1876.

To all whom it may concern:

Be it known that I, ALoHA VIVARTTAs, of the'city, county, and State ofNew York, have invented Improvements in Steam-Engines, ofwhich thefollowing is a specification, reference being had to the accompanyingdrawings, like letters referring to like parts. v

Figure l represents a vertical cross-section of my engine, with aportion of plate A removed to show the working parts. Fig. 2 is avertical longitudinal section of the same. Fig. 3 represents a front andside view of the eccentric-rings B B' and plate A. Fig. 4 represents aside and end view of the abutmentf. Fig.'5 vrepresents a side, end, andplan vienT of the valves f1. Fig. 6 represents a front and end view ofthe springfz.

This invention relates to what are commonly called rotary engines; andconsists of, first, a revolving plate, A, on each face of which aresecured ring-danges B', The ring-anges B B are located eccentricallyupon opposite sides of the plate A, so that they may balance each otherperfectly. The plate A is keyed or coupled to the shaft D, and revolvesin the case O. The case C has chambers c c', concentric with the centralhub of the case, and of sucient width and depth to permit the flanges Band B to revolve Within them.

Across the chambers c c' are two recesses, E E', in which traverse theabutments F F'. These abutments F F' are composed of a main frame, f f,which carries the abutments or valves proper, f1 f1, with their springsf2 f2 and spring packing-strips fafa. The ends of the abutments orvalves j"1 j"I are curved where they bear upon the sides of the flangesB B', and are held up to them by the springs fzfz, and have the springpacking-strips' j"3 f3 in the faces that bear upon the plate A, while inthe sides that are presented to the sides of the recesses E E' arerecessed chambers ff4 and as the abutments F F slide to and fro in therecesses E E', by the action of the ringflanges B B', the size of therecessed chambers f4f* in the abutments or valves, as they pass thesteam and exhaust ports e e in the sides of the recesses E E', wouldregulate the amount of' steam or point of cut-olf, as may be desired.

This engine works equally well backward or forward, being throttled,held, or reversed bythe single common D-valve I in the steamchest H. Inthis engine not only is the weight of the revolving parts perfectlybalanced, but also the steam-pressure, in a direction radial to theshaft D, is equal in every direction, while the power is constant, beingrepresented by the pressure of the steam multiplied by the area of theabutments F and F', the Vcircle of mean radius of the channels c c', andthe number of revolutions per minute; also, the pressure of the steambetween the plate A and case O upon one side just balances the similarpressure upon the other side, thus obviating any tendency to crowdendwise of the shaft D, and leaving the engine very light-running anddurable.

A similar arrangement of mechanism may, as in the ordinarypiston-engine, be used as an air-compressor, blower, pump, or meter forliquids or fluids.

Having thusdescribed the nature of my invention, what I claim, anddesire to secure by Letters Patent, is`

In a rotary engine, the combination, With the casing O, having thechamber o c and recesses E E', of the plate A, having eccentricring-flanges B B', the abutments or valves F F', through which thering-flanges pass, and formed by the parts f f1, having recessedchambers f4, for allowing steam to enter and exhaust from the chambers cc', the springs f, and packing-strips f3, all substantially as shown anddescribed.

ALOHA VIVARTTAS.

Witnesses:

HENRY BELDEN, R. E. VIvARTTAs.

